From 971229fe66cdc93135e0f7e41cdf2a0bce28cd67 Mon Sep 17 00:00:00 2001
From: gingerBill <bill@gingerbill.org>
Date: Thu, 6 Jun 2024 13:27:55 +0100
Subject: [PATCH] Fix #3686

---
 src/llvm_backend_expr.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/llvm_backend_expr.cpp b/src/llvm_backend_expr.cpp
index 7772ba930..36af60e46 100644
--- a/src/llvm_backend_expr.cpp
+++ b/src/llvm_backend_expr.cpp
@@ -504,6 +504,10 @@ gb_internal bool lb_is_matrix_simdable(Type *t) {
 	if ((mt->Matrix.row_count & 1) ^ (mt->Matrix.column_count & 1)) {
 		return false;
 	}
+	if (mt->Matrix.is_row_major) {
+		// TODO(bill): make #row_major matrices work with SIMD
+		return false;
+	}
 	
 	if (elem->kind == Type_Basic) {
 		switch (elem->Basic.kind) {